30 November 2012 Bending characteristics of long-period fiber grating with an over-coupled resonant wavelength
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Abstract
A CO2-induced LPG with an over-coupled resonant dip is fabricated. The bending characteristics of proposed LPG are experimentally studied in detail. The results show that the spacing between the two resonant wavelengths has a periodic behavior along circular directions. The spacing between the two resonant wavelengths changes nearly linearly against the curvature under certain bending directions. The bend sensitivities under two bending directions are 7.19nm/m and 3.13nm/m, respectively. In addition, the over-coupled dip splits into two dips when increases curvature under a special bending direction, which may be attributed to that new cladding mode meet coupling condition is excited.
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Xiaozhong Tian, Xiaozhong Tian, Chunying Guan, Chunying Guan, Shuqiang Li, Shuqiang Li, Xing Zhong, Xing Zhong, Libo Yuan, Libo Yuan, } "Bending characteristics of long-period fiber grating with an over-coupled resonant wavelength", Proc. SPIE 8561, Advanced Sensor Systems and Applications V, 856112 (30 November 2012); doi: 10.1117/12.999518; https://doi.org/10.1117/12.999518
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